What is the primary function of T cells in the immune response?

The primary function of T cells in the immune response is to recognize and destroy infected or foreign cells. T cells play a crucial role in the adaptive immune system by identifying specific antigens presented on the surface of cells. Once activated, cytotoxic T cells can directly kill cells that are infected with viruses or have become cancerous, while helper T cells assist by releasing cytokines that enhance the immune response and help other immune cells, such as B cells and macrophages, become more effective.

This direct action against infected or abnormal cells is vital for maintaining the body's defense against intracellular pathogens and ensuring the overall effectiveness of the immune system. Understanding the function of T cells underscores their role as key players in targeting specific threats that traditional antibodies cannot reach on their own, highlighting their importance in cellular immunity.